1 /* 2 * QEMU fuloong 2e mini pc support 3 * 4 * Copyright (c) 2008 yajin (yajin@vm-kernel.org) 5 * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn) 6 * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com) 7 * This code is licensed under the GNU GPL v2. 8 * 9 * Contributions after 2012-01-13 are licensed under the terms of the 10 * GNU GPL, version 2 or (at your option) any later version. 11 */ 12 13 /* 14 * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz) 15 * https://www.linux-mips.org/wiki/Fuloong_2E 16 * 17 * Loongson 2e manuals: 18 * https://github.com/loongson-community/docs/tree/master/2E 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qemu-common.h" 23 #include "qemu/datadir.h" 24 #include "qemu/units.h" 25 #include "qapi/error.h" 26 #include "cpu.h" 27 #include "hw/clock.h" 28 #include "net/net.h" 29 #include "hw/boards.h" 30 #include "hw/i2c/smbus_eeprom.h" 31 #include "hw/block/flash.h" 32 #include "hw/mips/mips.h" 33 #include "hw/mips/bootloader.h" 34 #include "hw/mips/cpudevs.h" 35 #include "hw/pci/pci.h" 36 #include "hw/loader.h" 37 #include "hw/ide/pci.h" 38 #include "hw/qdev-properties.h" 39 #include "elf.h" 40 #include "hw/isa/vt82c686.h" 41 #include "sysemu/qtest.h" 42 #include "sysemu/reset.h" 43 #include "sysemu/sysemu.h" 44 #include "qemu/error-report.h" 45 46 #define ENVP_PADDR 0x2000 47 #define ENVP_VADDR cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR) 48 #define ENVP_NB_ENTRIES 16 49 #define ENVP_ENTRY_SIZE 256 50 51 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */ 52 #define BIOS_SIZE (512 * KiB) 53 #define MAX_IDE_BUS 2 54 55 /* 56 * PMON is not part of qemu and released with BSD license, anyone 57 * who want to build a pmon binary please first git-clone the source 58 * from the git repository at: 59 * https://github.com/loongson-community/pmon 60 */ 61 #define FULOONG_BIOSNAME "pmon_2e.bin" 62 63 /* PCI SLOT in Fuloong 2e */ 64 #define FULOONG2E_VIA_SLOT 5 65 #define FULOONG2E_ATI_SLOT 6 66 #define FULOONG2E_RTL8139_SLOT 7 67 68 static struct _loaderparams { 69 int ram_size; 70 const char *kernel_filename; 71 const char *kernel_cmdline; 72 const char *initrd_filename; 73 } loaderparams; 74 75 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index, 76 const char *string, ...) 77 { 78 va_list ap; 79 int32_t table_addr; 80 81 if (index >= ENVP_NB_ENTRIES) { 82 return; 83 } 84 85 if (string == NULL) { 86 prom_buf[index] = 0; 87 return; 88 } 89 90 table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE; 91 prom_buf[index] = tswap32(ENVP_VADDR + table_addr); 92 93 va_start(ap, string); 94 vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap); 95 va_end(ap); 96 } 97 98 static uint64_t load_kernel(MIPSCPU *cpu) 99 { 100 uint64_t kernel_entry, kernel_high, initrd_size; 101 int index = 0; 102 long kernel_size; 103 ram_addr_t initrd_offset; 104 uint32_t *prom_buf; 105 long prom_size; 106 107 kernel_size = load_elf(loaderparams.kernel_filename, NULL, 108 cpu_mips_kseg0_to_phys, NULL, 109 &kernel_entry, NULL, 110 &kernel_high, NULL, 111 0, EM_MIPS, 1, 0); 112 if (kernel_size < 0) { 113 error_report("could not load kernel '%s': %s", 114 loaderparams.kernel_filename, 115 load_elf_strerror(kernel_size)); 116 exit(1); 117 } 118 119 /* load initrd */ 120 initrd_size = 0; 121 initrd_offset = 0; 122 if (loaderparams.initrd_filename) { 123 initrd_size = get_image_size(loaderparams.initrd_filename); 124 if (initrd_size > 0) { 125 initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE); 126 if (initrd_offset + initrd_size > loaderparams.ram_size) { 127 error_report("memory too small for initial ram disk '%s'", 128 loaderparams.initrd_filename); 129 exit(1); 130 } 131 initrd_size = load_image_targphys(loaderparams.initrd_filename, 132 initrd_offset, 133 loaderparams.ram_size - initrd_offset); 134 } 135 if (initrd_size == (target_ulong) -1) { 136 error_report("could not load initial ram disk '%s'", 137 loaderparams.initrd_filename); 138 exit(1); 139 } 140 } 141 142 /* Setup prom parameters. */ 143 prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE); 144 prom_buf = g_malloc(prom_size); 145 146 prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename); 147 if (initrd_size > 0) { 148 prom_set(prom_buf, index++, 149 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s", 150 cpu_mips_phys_to_kseg0(NULL, initrd_offset), 151 initrd_size, loaderparams.kernel_cmdline); 152 } else { 153 prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline); 154 } 155 156 /* Setup minimum environment variables */ 157 prom_set(prom_buf, index++, "busclock=33000000"); 158 prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock)); 159 prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB); 160 prom_set(prom_buf, index++, NULL); 161 162 rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR); 163 164 g_free(prom_buf); 165 return kernel_entry; 166 } 167 168 static void write_bootloader(CPUMIPSState *env, uint8_t *base, 169 uint64_t kernel_addr) 170 { 171 uint32_t *p; 172 173 /* Small bootloader */ 174 p = (uint32_t *)base; 175 176 /* j 0x1fc00040 */ 177 stl_p(p++, 0x0bf00010); 178 /* nop */ 179 stl_p(p++, 0x00000000); 180 181 /* Second part of the bootloader */ 182 p = (uint32_t *)(base + 0x040); 183 184 bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8, 185 loaderparams.ram_size, kernel_addr); 186 } 187 188 static void main_cpu_reset(void *opaque) 189 { 190 MIPSCPU *cpu = opaque; 191 CPUMIPSState *env = &cpu->env; 192 193 cpu_reset(CPU(cpu)); 194 /* TODO: 2E reset stuff */ 195 if (loaderparams.kernel_filename) { 196 env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); 197 } 198 } 199 200 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc, 201 I2CBus **i2c_bus) 202 { 203 PCIDevice *dev; 204 205 dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true, 206 TYPE_VT82C686B_ISA); 207 qdev_connect_gpio_out(DEVICE(dev), 0, intc); 208 209 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide"); 210 pci_ide_create_devs(dev); 211 212 pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci"); 213 pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci"); 214 215 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM); 216 *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c")); 217 218 /* Audio support */ 219 pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97); 220 pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97); 221 } 222 223 /* Network support */ 224 static void network_init(PCIBus *pci_bus) 225 { 226 int i; 227 228 for (i = 0; i < nb_nics; i++) { 229 NICInfo *nd = &nd_table[i]; 230 const char *default_devaddr = NULL; 231 232 if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) { 233 /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */ 234 default_devaddr = "07"; 235 } 236 237 pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr); 238 } 239 } 240 241 static void mips_fuloong2e_init(MachineState *machine) 242 { 243 const char *kernel_filename = machine->kernel_filename; 244 const char *kernel_cmdline = machine->kernel_cmdline; 245 const char *initrd_filename = machine->initrd_filename; 246 char *filename; 247 MemoryRegion *address_space_mem = get_system_memory(); 248 MemoryRegion *bios = g_new(MemoryRegion, 1); 249 long bios_size; 250 uint8_t *spd_data; 251 uint64_t kernel_entry; 252 PCIDevice *pci_dev; 253 PCIBus *pci_bus; 254 I2CBus *smbus; 255 Clock *cpuclk; 256 MIPSCPU *cpu; 257 CPUMIPSState *env; 258 DeviceState *dev; 259 260 cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); 261 clock_set_hz(cpuclk, 533080000); /* ~533 MHz */ 262 263 /* init CPUs */ 264 cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); 265 env = &cpu->env; 266 267 qemu_register_reset(main_cpu_reset, cpu); 268 269 /* TODO: support more than 256M RAM as highmem */ 270 if (machine->ram_size != 256 * MiB) { 271 error_report("Invalid RAM size, should be 256MB"); 272 exit(EXIT_FAILURE); 273 } 274 memory_region_add_subregion(address_space_mem, 0, machine->ram); 275 276 /* Boot ROM */ 277 memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE, 278 &error_fatal); 279 memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios); 280 281 /* 282 * We do not support flash operation, just loading pmon.bin as raw BIOS. 283 * Please use -L to set the BIOS path and -bios to set bios name. 284 */ 285 286 if (kernel_filename) { 287 loaderparams.ram_size = machine->ram_size; 288 loaderparams.kernel_filename = kernel_filename; 289 loaderparams.kernel_cmdline = kernel_cmdline; 290 loaderparams.initrd_filename = initrd_filename; 291 kernel_entry = load_kernel(cpu); 292 write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry); 293 } else { 294 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 295 machine->firmware ?: FULOONG_BIOSNAME); 296 if (filename) { 297 bios_size = load_image_targphys(filename, 0x1fc00000LL, 298 BIOS_SIZE); 299 g_free(filename); 300 } else { 301 bios_size = -1; 302 } 303 304 if ((bios_size < 0 || bios_size > BIOS_SIZE) && 305 machine->firmware && !qtest_enabled()) { 306 error_report("Could not load MIPS bios '%s'", machine->firmware); 307 exit(1); 308 } 309 } 310 311 /* Init internal devices */ 312 cpu_mips_irq_init_cpu(cpu); 313 cpu_mips_clock_init(cpu); 314 315 /* North bridge, Bonito --> IP2 */ 316 pci_bus = bonito_init((qemu_irq *)&(env->irq[2])); 317 318 /* South bridge -> IP5 */ 319 vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5], 320 &smbus); 321 322 /* GPU */ 323 if (vga_interface_type != VGA_NONE) { 324 pci_dev = pci_new(-1, "ati-vga"); 325 dev = DEVICE(pci_dev); 326 qdev_prop_set_uint32(dev, "vgamem_mb", 16); 327 qdev_prop_set_uint16(dev, "x-device-id", 0x5159); 328 pci_realize_and_unref(pci_dev, pci_bus, &error_fatal); 329 } 330 331 /* Populate SPD eeprom data */ 332 spd_data = spd_data_generate(DDR, machine->ram_size); 333 smbus_eeprom_init_one(smbus, 0x50, spd_data); 334 335 /* Network card: RTL8139D */ 336 network_init(pci_bus); 337 } 338 339 static void mips_fuloong2e_machine_init(MachineClass *mc) 340 { 341 mc->desc = "Fuloong 2e mini pc"; 342 mc->init = mips_fuloong2e_init; 343 mc->block_default_type = IF_IDE; 344 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E"); 345 mc->default_ram_size = 256 * MiB; 346 mc->default_ram_id = "fuloong2e.ram"; 347 mc->minimum_page_bits = 14; 348 } 349 350 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init) 351